Anti-panic lock mechanism



June 14, 1932 w, E, STONEBRIDGE ANTIPANIC LOCK MECHANISM Filed NOV. 29, 1950 4 Sheets-Sheet w. E. sToNEBRlbGE 1,863,129

June 14, 1932.

ANTIPANIC 'LOCK MECHANISM 4 Sheets-Sheet 2 Filed NOV. 29, 1950 3ra/vento@ 1930 4 SheebS-Shee 5 June 1 4, 1932- w.. E. STONEBRIDGE ANTIPANIC LOCK MECHANISM Filed Nov. 29

June 14, 1932. w. E. STONE-:BRIDGE ANTIPANIC LOCK MECHANISM 4 Sheets-Sheet 4 Filed Nov. 29, 195o It b U i .52 a o ca YUnwin... r/

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Patented .lune M, 1932 UNTED STATES PATENT OFFICE ANTI-PANIC LOCK MECHANISM Application filed November 29, 1930.

My invention relates to locks for doors and has particular reference to an improvement in anti-panic lock mechanisms adapted for use on the stair and/or exit doors of schools,

churches, assembly halls, theatres, auditoriums and similar buildings.

It is an object of my invention to provide a mechanism tor locking swinging doors, which mechanism is normally released by actuation of an anti-panic bar or other mechanism to permit the door to be moved to open position.

It is a further object of my invention to provide a lock mechanism adapted for mountinoin or on a door jamb and including a latching member adapted to cooperate with a keeper in or on the tree edge of a swinging door, and to associate with this jamb-mounted mechanism a door mounted, anti-panic bar-actuated, releasing mechanism whereby the latching member may be released by operation of the anti-panic bar to permit the door to be moved to open position. v

It is a further object of my invention to provide a mechanism for locking swinging doors, which mechanism mai,7 be released by actuation of an anti-panic bar or the like, and to associate with this mechanism means whereby the same may be released independently of the actuation oi the antipanic bar or the like.

It is a still further object of my invention to provide a lock mechanism for locking swinging doors, which mechanism is normally released by actuation ot an anti-panic bar or the like mounted on that side of the door within the building, and to provide a mechanism operable from that side of the door outside the building, whereby the lock mechanism may be released independently of the actuation of the anti-panic bar or the like to permit the door to be moved to open position.

It is a still further object of my invention to provide a lock mechanism adapted for n'iounting in or on a door amb and including an operating shaft for releasing the lock mechanism. means carried by the door for actuating said release shaft to permit the Serial No. 499,108.

door to be moved to open position, and means associated with the release shaft to lock the same in inoperative position, whereby the door may be moved to open and closed position independently of the operation of the said release shaft.

It is a still further object of my'invention to provide a mechanism for locking swinging doors which mechanism is normally released by actuation of an anti-panic bar or the like, and to associate with said mechanism means whereby the operation of the lock mechanism is rendered effective by the provision of spring means which delay or retard the action of the mechanism when the operation is other than normal, the entire mechanism being simpleV in construction, cheap and yeasy to manufacture, strong and durable and highly eicient in the purposes for which designed.

In the accompanying drawings forming ay part of this specification and in which like numerals are employed to designate like parts throughout the several views Figure l is a front view of a portion of a door amb and a portion of the free edge of a swinging door, this view being taken from the inside of the building, and showing the installation of my improved anti-panic lock mechanism,

Fig. 2 is a horizontal sectional view on the line 2 2 of Fig. 1, showing the position of the anti-panic lock mechanism when the door is in closed or locked position,

Fig. 8 is a horizontal sectional view similar to Fig. 2, and showing the position of the 'jamb-carried portion ofthe anti-panic lock mechanism when the door is in open or unlocked position,

Fig. 4f is a vertical side elevation of the jamb-carried portion of the anti-panic lock mechanism, showing the position of that portion of the mechanism when the door is in open or unlocked position,

Fig. 5 is a vertical sectional view on the line 5*.5 of Fig. 2,

Fig. 6 is an enlarged perspective View ot the latch-setting mechanism of my improved device,

Fig. 7 is a tragmental sectional view of a part of the jamb-carried portion of the antipanic lock mechanism showing certain details of construction, and

Fig. 8 is' an enlarged exploded view showing in perspective the detailed construction of some of the principal members constituting the jamb-carried mechanism of my improved device.

Referring to the drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numera 1 designates a portion of a door jamb, in which is mounted, for swinging movement, a door 2. The door 2 and jamb 1 may be of any ordinary or preferred construction and formno part of my present invention, it being understood thatV the door 2 is supported or mounted on suitable hinges and that the portion of the door shown in Figs. 1 and 2 is adapted to swing to and from the jamb 1 as the door is moved to closed and open positions respectively. v

. The door-carried portion of my improved anti-paniclock mechanism comprises a face plate 3 attached at a convenient height to the inner face of the door 2 near the free edge thereof, this face plate 3 including a hollow, box-like casing 4, having an elongated, vertically-extending opening 5 through the front face, thereof.k The opening 5 is bordered by spaced, parallel, outwardly extending flanges 6 and 7, between which is pivotally mounted a segmental operating member 8, having on one side face thereof an operating cam 9, the member 8 being pivotally mounted within the casing 4 through the instrumentalityof a pivot pin 10 extending through the flanges 6rand 7, as clearly shown in Fig. 2. The operating member 8 is provided with a radially-extending arm 11, from the end of which extends an anti-panic bar 12. This bar 12 extends horizontally for substantially the entire width of the door 2 and terminates near thehinge side of the door, where it is connected to a pivotal mounting (not shown) it being understood that as the anti-panic bar 12 is moved to and from the door, such movement will cause the oscillation of the operating member 8 aboutthe pivot pin 10 for a purpose to be hereinafter described. The bar 12 is normally held in lextended position, i. e.,away from ythe face of the door, by means of a coil spring 13, which extends between a stationary lug 14 positioned within the hollow casing 4 and asecuring lug 15 mounted on the sidel face of the operating member 8. Tithin the hollow casing 4 is a latch-operating shaft 16, mounted for horizontal sliding movement in bracket 17 attached to the inner side of the rear wall of the casing 4, the inner end of this latch-operating shaft 16 being urged into contact with the face of the cam member 9 by means of a fiat spring 18 and the outer end of said shaft extending through the side of the casing as clearly shown in Fig. 2. Preferably, this latch operating shaft 16 is made in two sections connected by a threaded shank, whereby the length of the shaft and, hence, the amount of its projection beyond the side of the casing 4, may be readily adjusted.

The door-carried portion of my improved anti-panic lock further includes a lug actuated lock mechanism 19, preferably of the cylinder type, adapted for actuation from the outside of the building in which the door 2 equipped with my device, is installed. This lock mechanism 19 is adapted to oscillate a lever 20 pivotally mounted at 21 and having its lower end terminating adjacent the inner end of the latch operating shaft 16.

v Referring now to the operation of the doorcarried vportion of my improved anti-panic lock mechanism, the details of construction of which have just been described, it will be seen that the spring 13 normally maintains the anti-panic bar 12 in an extended position, i. e., away from the face of the door. When the anti-panic bar 12 is pushed downwardly against the door, such movement causes a partial rotation of the operating member 8 about the pivot pin 10, and, hence, the operating cam 9 will cause the latch-operating shaft 16 to be projected through the side of the casing 4, the extent of such projection being determined by the initial adjustment of the length of said yshaft by means of its sectional, screw-shank-connected construction. When pressure is released on the anti-panic bar 12, the coil spring 13 is then effective to move the operating member 8 about is pivot pin 10 to return the bar 12 to its extended position, this movement of the operating member 8 withdrawing the high or peak portion of the cam 9 from contact with the inner end of the latch operating shaft and permitting the spring 18 to retract the said shaft to its normal position within the casing. In the event that it should be necessary to project the latch operating shaft 16 to its extended position independently of the action of the operating member 8 and cam 9, as, for example, if it is desired to actuate the shaft 16 from the outside of the building, a suitable key is inserted in the loclr19 and the lock rotated to cause the oscillation of the lever 20 about its pivot 21, wh-ereupon the lower end of said lever will engage the inner end of the shaft and will move'the shaft to its extended position beyond the side of the casing 4. Upon the return of the lock mechanism 19 to its normal position, the lever 2O will be returned to the position best shown in Fig. 1 and the spring 1S will retract the latchoperating shaft 16 to its normal position within the casing 4.

' The j amb-carried portion of my improved anti-panic lock mechanism comprises a casing 22 Vadapted for mounting within the j amb 1 and having an outer, open side covered by a face plate 23, the major-portion of which is flush with the side face of the door jamb l as clearly shown in Figs. 2 and 3. The inner edge of theface plate 23 has formed integral therewith an open-sided, vertically extending, hollow casing 24 which projects into the door'opening, beyond thev face plate 23 and jamb l and constitutes a stop against which the free edge of the door 2 abutsto limit the inward or closing movements of the door; The side wall of thev casing 24 and also the face p-late 23 are apertured to permit the passage therethrough ofy a release shaft 25, the casings 22 and 24 and face plate 23 being so positioned and mounted that the outer end of the release shaft 25 is inv horizontal alinement with th-e outer end of the latch-operating shaft 16 previously described, whereby the outward or projected movement of the shaft 16 will cause the release shaft 25 to be moved into the casing 22. The inner end of the release shaft 25 is axially bored and receives therein the outer or free end of a guide rod 26, the inner end of which is rigidly secured within the casing 22 by m-eans ofa supporting lug 27. A bracket member 28 is slidably mounted on the rod 26 between the release shaft 25 and the supportinglr lug 27, and between this bracket member 28 and the release shaft 25 is positioned a coil compression spring 29 which functions as a thrust spring to take up any excessive pressure above that normally required to move or slide the said bracket 28 inwardly along the guide rod 26.

A latch member 30, the detailed construction of which is best shown in the perspective viewof Fig. 8, is pivotally mounted on a vertical pivot pin 3l positioned at one side of a suitable opening in the face plate 23 and, by mechanism to be presently described, is moved about said pivot to a door-latching position or to a door-releasing position as shown in Figs. 2 and 3 respectively. For effecting the swinging movement of the latch 30 about the pivot 3l, I provide the inner, bottom face of said latch with a segmental gear 32 formed integral with the latch and so machined asto cooperate with a rack supported on ay horizontally-extending platform 33ahaving a depending flange 33h by means of which said platform is riveted or otherwise attached to the inner side of the casing 22 and also having an upstanding fiange 33o which functions to guide the rack 33 into engagement with the segmental gear A resilient arm 34 has its upper end attached to the inner' end of the rack and its lower end rigidly secured to the bottom of the casing 22. The upper end of the resilient arm 34 and hence the inner end of the rack 33 is connected to the upper end 35 of an L- shaped lever 36 by a coil spring 37, the tension ofthis spring being suchy that in the normal operation of the device said spring 'will not be stretched or extended. Attached to the lower, horizontal arm of the L-sh'aped lever 36 is a segmental block 38 which, when the door is in open position, extends through the open face of the casing 24 and into a position to be engaged by the door as the door is moved into closed position, it being noted that the horizontal arm of the L-shaped lever is pivotally mounted in the spaced, parallel side walls of the casing 24 and that as the block 38 is engaged by the door the upper end 35 of the lever 36 will, by reason of the conneetingA spring 37, cause the rack 33 to slide across the supporting platform and to engage the segmental gear 32 to move the latch member'30 into the position shown in Fig. 2, i. e., into latched position'.

For the purpose ofholding the latch 30 in the position shown in Fig. 2, i. e., in latched position, I provide a segmental block 39 mounted on'a vertical pivot pin 40 positioned at one side of a suitable opening through the face plate 23, this segmental block 39 projecting through and beyond the face plate 23 and into a position to be engaged by the door as the door is moved into closed position, it being noted that said segmental block, as best shown in Figs. 3 and 4, is engaged by the door slightlyin advance of the engagement between the door and the segmental block 38. The inner face of the segmental block 39 is recessed as shown at 4l and one end of a connecting link or rod 42 is inserted within this recess and pivotally connected to the block by a pivot pin 43. The connecting rod 42 extends through an apertured, upstanding arm of an L-shaped lug 44, which is pivotally mounted near one'end of a lever 45, the inner end of the rod 42 being provided with a transversely extending cotter pin or similar fastening means 46. A coil compression spring 47 surrounds the rod 42 and is conlined between the upstanding arm of the L-shaped lug 44 and a suitable washer 48 fixedly secured on the rod 42. The lever v45 is pivotally mounted interthe inner, top side of the easing 22, and the other end of this lever `45' is pivotally connected to an upstanding lug 50 carried on the upper edge of a locking dog- 5l, pivotally mounted fon the inner side wall of the casing 22 by means of pivot pin 52 extending between the spaced, stationary lugs The upper edge ofthe locking dog 51 is further provided with an upstanding lug 54, to which mediate its ends on a lug 49 depending from f is pivotally attached an extended portion of 1 the member 28, as best shown in Fig. 7. The outer lat'face of the locking dog 5l is provided with a horizontal recess 55, and a flat spring member 56 overlies this recess, the inner end of said spring being attached to the body of the locking dog 5l by means of screws, rivets or other fastening means. The free end of said spring member is bowed outwardly to normally extend slightly beyond the side face of the locking dog 5l.

The jambcarried portion of my improved anti-panic loc-k and further includes means whereby the release shaft may be selectively retained in its inner position so that the locking dog 51 will not interfere with the free movements of the latch member and the door. will thus be permitted to move to opened and/or closed position without causing the locking dog 51 to engage behind the latch 30 to prevent its inward or release movements. For accomplishing this purpose, I provide a small cylinder 57 mounted within the casing 24 and rotatable, by means of an operating key, from the exterior of the said casing. The rear, inner face of the cylinder 57 is provide-d with an axially extending lug 58 which, when the cylinder 57 is turned a quarter-turn to the right, enters within a notch or recess 59 in the release shaft 25 and thus retains the said release shaft in inoperative position within the casing 22. In

Vorder to Vretain the cylinder 57 in a position to keep the lug 58 within the recess 59, I flatten a portion 60 on the Aside of the said cylinder, this flattened portion'60 being in axial alinement with thelug 58. I further provide a fla-t leaf spring 61 secured to the inner side of the face plate 23 within the casing 24, said spring bearing against the flattened portion 60 on the cylinder 57 and retaining the cylinder in vits adjusted position when the lug 58 is moved to engage the recess or notch 59.

Assuming that the free edge of the door is provided with recess 62 covered with an apertured keeper plate 63, and referring now to the operation of the jamb-carried portion of my improved anti-panic lock mechanism, the details of construction of which have just been described, and referring particularly to Fig. 3 of the accompanying drawings, it will be seen that as the door 2 moves to closed position the edgeof said door will engage the segmental block 39, causing the same to move about its pivot to a position .inl which its outer face is substantially Hush with the face plate 23. This pivotal movement forces the connecting rod 42 inwardly and compresses the spring 47 between the collar 48 and lug 44. The door then engages the segmental block 38 vand causes the L-shaped lever 36 to move about its pivotal mounting. Thus, the upper end 35 of the lever 36, through the spring 37 moves the rack 33 forwardly, this rack en-.

gaging the segmental gear 32 and causing the latch 30 to move about its pivotal mounting 31, whereupon the outer end of the latch will pass through the apertured keeper plate 63 into the recess 62 in the edge of the door 2. As soon as the keeper enters the recess 62, the spring 47, previously compressed by the inward movement of 4the segmental member 39 as above described, expands to force the lever about its pivot 49,^thus causing the outer, free end of the locking dog 51 to engage behind the inner flat face of the latch member 30 to positively retain the latch 30 within the recess 62, and thus the door is retained in locked position as clearly shown in Fig. 2.

Vhen it is desired to release the latch mechanism to permit the door to be opened, the anti-panic bar 12 is moved downwardly t0 ward the door, thus causing a partial rotation of the segmental operating member 8 about its pivot 10. This partial rotation causes the cam 9 to engage the latch operating shaft 16and to Yproject the same through the side of the casing 4 and into engagement with the release shaft 25. Inward movement of the release shaft 25, through the spring 29, moves the bracket member 28 inwardly along the guide rod 26 and, due to the connection between said bracket member 26 and the upstanding lug 54 on the locking dog 51, said locking dog 51 is swung inwardly about its pivotal mounting 52 to a position where it no longer engages behind the inner flat face of the latch member 30 and, hence, continued outward movement ofthe door 2 swings the latch member 30 inwardly about its pivot 31.

As the locking dog 51 swings inwardly as dee scribed, the upstanding lug carried at the upper free edge thereof causes the lever 45 to swing about its pivot 49, this movement compressing the spring 47 between the lug 44 and the washer 48, it being obvious that contact between the edge of the door and the pivoted segmental block 39 will prevent the lever 45 from moving the connecting rod 42 to force the segmental block to its outer or projected position. Of course, just assoon as the opening movement of the door has progressed suliiciently for the edge of the door to clear the jamb, the spring 47 expands and the segmental block 39 is forced outwardly to a position shown in Fig. 3 ready to be engaged by the door when next brought to closed position. As the latch 30 is moved into the casing 22 when the door is opened as above described, the engagement between the segmental gear 32 causes the rack 33 to move inwardly, this movement, due to the flexible arm 34 and 'spring connection 37, moving the upper end 35 of the L-shaped lever 36 inwardly andV projecting the segmental block'38 from its casing 24 to a'position shown 1 in Figs. 3 and 4 ready to be engaged by the door when nextbrought to closed position. In the event that it should be necessary or desirable to unlock the doorV from the outside of the building, and independent-ly of the actuation of the anti-panic bar 12, a suitable key is inserted in the lock 19 and turned to move the lever 20 about its pivot 21 so that the lower end of said'lever 2O forces the latch operating shaft 16 into contact with theV end lil lock 19, the release shaft is moved inwardly and the lock 57 actuated to bring the lug 58 into the recess 59, whereupon the locking dog 51 will not interfere with the free movements of the latch member and the door can be freely opened and closed.

Attention is invited to the fact that the spring 29 functions as a thrust spring to tal; up any excessive pressure, i. e., during the normal operation of the device said spring is not compressed between the release shaft and bracket membei` 28, but if the door should not be opened as soon as the locking dog 51 is moved from locking` engagement from behind the latch member 30, then the spring 29 will be compressed in order to taire up any excessive pressure above that normally required to move or slide the bracket member 28 inwardly along the rod 26. Further safeguards for insuring the proper operation oi' the device include the spring 37, which under normal operating conditions will act as a direct or positive connection between the arm and operating rack 33 and will not be eX- tended. If, however, the block 38 should be depressed when the door is in open position, assuming that the segmental block 39 has not been previously depressed, the spring 37 will not be stretched or tensioned and the movement of the arm 35 will be transmitted to the rack 33, provided there is nothing to prevent the block 39 from moving to its outer position. J ust assoon as the pressure on the segmental block 38 is removed, the spring 37 will contract, and in so doing will pull the arm 35 inwardly about its pivot and, hence, `will project the segmental block 33 into a position to be engaged by the door. In the event that the door should move to closed position before the segmental block 38 can be projected by the contracting of the spring 37 as above described, it is obvious Athat the segmental block 39 has been depressed by the closing of the door and, since the door is in closed position and the segmental block. 38 cannot be projected, the contracting of the spring 37 will pull the rack 33 forwardly to project the latch member 30 into theflreeper plate 63 t-o thus lock the door. This spring 37 is also a precautionar f mechanism which comes into play to permit the proper operation of the device in the event that the latch member 30vshould strike tl e keeper plate 63 before going into the recess 62. If this should occur, the spring 37 will be stretched or extended, but as soon as the recess 62 comes opposite the latch member 30, the said spring 37 will contract and the rack 33 will be moved forwardly to project the latch into the recess 62. The provision of theleaf spring 56 flexing within the recess in the locking dog 51, is for the purpose of preventing the locking dog 51 from sticking behind the latch member 30. This spring 56 yslides against the face of the latch member 30 and is only strong enough to push the locking dog 51 out from behind the latch member 30l when no pressure is being applied on the segmental block 39.

It is to be understood that the form of my invention herein shown and described is to be taken as a preferred enibodiment of my invention, and that numerous changes may be made in the shape, size and arrangement of parts without departing from the spirit of my invention or the scope of the subjoined claims.

Having thus described my invention, I claim 1. A lock mechanism for doors comprising a locking member, a reciprocating shaft mounted in the doer jamb for releasing said locking member, a reciprocating operating shaft carried by the door in alinement with the releasing shaft, an anti-panic bar carried by the door, and an operating cam member actuated by the anti-panic bar to reciprocate the operating shaft and releasing shaft to release the locking member to permitthe door to be moved to open position.

2. A lock mechanism for doors comprising a locking member mounted in a door jamb, a reciprocating shaft mounted in the door jamb for releasing said locking member an operating shaft in alinement with the releasing' shaft, an operating cam member for the operating shaft, an anti-panic bar carried by the door for normally actuating the operating cam member to release the locking member to permit the door to be moved to open position, and a key-controlled mechanism for actuating the operating shaft independently of the operation of the anti-panic bar.

3. A lock mechanism for doors comprising a locking member mounted in a door jamb, a reciprocating shaft mounted in the door jamb for r-eleasing said locking member, an operating shaft in alinement with the releasing shaft, means for normally actuating the operating shaft to release the locking member to permit the door to be moved to open position, a pivoted lever having its lower end adjacent the operating shaft, and a key-controlled mechanism associated with the upper end of said lever to force the lower end of said lever into operative contact with said operating shaft to actuate the operating and releasing shafts independently ofthe operation of the normal actuating means for the operating shaft.

4. A lock mechanism for doors comprising a locking member mounted in a door jamb, a reciprocating shaft mounted in the door jamb for releasing said locking member, an operating shaft in alinement with the releasing shaft, means carried by the door for normally actuating the operating and releasing shafts to release the locking member to permit the door to be moved to open position, and means for locking the releasing shaft in ilo inoperative position whereby the door may be moved to open position independently of the actuation of the operating shaft.

5. A lock mechanism for doors comprising a locking member mounted in a door jamb, a reciprocatingshaft mounted in the door jamb for releasing said locking member, a reciprocating operating shaft in alinement with the releasing shaft, means carried by the door for normally actuating the operating and releasing shafts to release the locking member to permit the door to be moved to `open position, and a locking cylinder associated with the release shaft for locking said shaft in inoperative position whereby the door may be moved to open position independently of the actuation of the operating shaft. c f

6. A lock mechanism for doors comprising a locking member; a releasing shaft for said locking member, said releasing shaft having a. locking recess in one face thereof; means for normally actuating Vthe releasing shaft to release the locking member to permit the door to be moved to open position; a locking cylinder associated with the release shaft, said cylinder having a lug adapted to enter the locking recess in the releasing shaft; and means to rotate said locking cylinder to move the lug into the locking recess in the releasing shaft to lock said shaft in inoperative position whereby the door may be moved to open position independently of the actuation of the release shaft.

7 A lock mechanism for doors comprising a locking member, a pivoted lever engaged by the door when the same is moved into closed position, means for actuating the locking member, arnormally non-extensible spring member connecting the lever and loclr actuating means to move the loc-king member into locked position, and means for releasing the locking member to permit the door to be moved to open position. A Y y 8. A lock mechanism for doors comprising a locking member; a pivoted lever engaged by the door when the same is moved into closed position; means for actuatingfthe locking member; a spring'member connecting the lever and lock actuating means to move the locking member into locked position, said spring being normally non-extensible and acting as a direct connection between the lever and lock actuating means butbeing eX- tensible, under abnormal operating conditions, and by its contraction, effecting the delayed actuation of the lock actuating means independently of the further operation of the lever.`and means for-releasing the locking member to permit the door to be moved to open position. Y Y

9. A lock mechanism for doors comprising a locking member,'a gear associated with said locking member, a rack engaging the gear, means engaged by the door when moved to closed position to actuate the rack and gear to move the locking member into locked position, and means for releasing the locking member to permit the door to be moved to open position.

10. A lock mechanism for doors comprising a segmental locking member pivotally mount-ed in a door jamb, a segmental gear associated with the locking member, a rack engaging the segmental gear, a pivoted lever engaged by the door when the same is moved to closed position, a connecting member between the lever and rack to actuate the rack and segmental gear to move the locking member into locked position, and means for releasing the locking member to permit the door to be moved to open position.

11. A locking mechanism for doors comprising a segmental locking member pivotally mounted in a door jamb, a segmental gear carried by the locking member, a rack engaging the segmental gear, a resilient supporting spring for said rack. a pivoted' lever engaged by the door when the same is moved to closed position, a connecting member between the lever and rack-supporting spring to actuate the rack and segmental gear to move the lockingmember into locked position, and means carried by the doorfor releasing the locking member lto permit the Vdoor to be moved to open position.

12. A locking mechanism for doors comprising a segmental locking member'pivotally mounted in a door jamb, a segmental gear carried by the locking member, a rack engaging the segmental gear, a resilient supporting spring for said rack. a pivoted lever engaged by the door when the same is moved to closed position, a spring member connecting the lever and rack-supporting spring to actuate the rack and segmental gear to move the locking member into locked position, a locking dog for retaining the locking memberin locked position, and means carried byV the door for releasing theloclring dog to release the locking member to permit the door to be moved to open position.

13. A lock mechanism for doors comprising a locking member, means engaged by the door when moved into closed position to actuate the locking member into locked posit-ion, a locking dog for retainingthe locking member in locked position. a release shaft for Ythe locking dog. and means for operating the release shaft to release the locking dog to release thelocking member to permit the door to be moved to open position.

14. A lock mechanism for doors comprising a locking member, meansv engaged by the door when moved into closed position to actuate the locking member into locked position, a locking dog for retaining the locking member in locked position, a release shaft for the locking dog, a spring betweenfthe release shaft and' the locking dogto tale up any excessive pressure above that required to release the locking dog, and means for operating the release shaft to release the locking dog to release the locking member to permit the door to be moved to open position.

l5. A lock mechanism for doors compris ing a segmental locking member pivotally mounted Within the door jamb, means engaged by the door when moved into closed position to move said .segmental member about its pivot to locking position, a pivoted locking dog engaging the segmental member to retain the same in locked position, a bracket member connected to the locking dog, a release shaft for moving the bracket member to release the locking dog from engagement with the segmental member, and -means for operating the release shaft to permit the door to be moved to open position.

16. A lock mechanism for doors comprising a segmental locking member pivotally mounted Within the door jamb, means engaged by the door When moved into closed position to move said segmental member about its pivot to locking position, a pivoted locking dog engaging the segmental member to retain the same in locked position, a guide rod adjacent the pivoted looking dog, a reciprocating bracket member connected to the locking dog and mounted on said guide rod, a release shaft mounted on the guide rod to release the locking dog from engagement with the .segmental member, a spring mounted on the guide rod between the release shaft and' bracket, and means for operating the release shaft to move the bracket to release the locking member to permit the door to be moved to open position.

17. A lock mechanism for doors comprising a locking member, means engaged by the door when moved into closed position to actuate the locking member into locked position, a locking dog for the locking member, a pivoted lever for moving the locking dog into engagement with the locking member, means controlled by the closing of the door to operate the pivoted lever to move the locking dog into engagement with the locking member to retain the same in locked position, and means for releasing the locking dog to release the locking member to permit the door to be moved to open position.

18. A lock mechanism for doors comprising a locking member, means engaged by the door when moved into closed position to actuate the locking member into locked position, a locking dog for the locking member, a pivoted lever for moving the locking dog into engagement With the locking member, an operating block controlled by the closing of the door, a. connecting rod between the lever and operating block to operate the pivoted lever to move the locking dog into engagement with the lockingmember to retain the same in locked position, and means for releasing the locking dog to release the locking member to permit the door to be moved to open position.

19. A lock mechanism for doors comprising a locking member, means engaged by the door when moved into closed position to actuate the locking' member into locked position, a locking dog for the locking member, a pivoted lever for moving the locking dog into engagement with the locking member, an operating block controlled by the closing of the door, a resilient connection between the lever and operating block to operate the pivoted lever to move the locking dog into engagement With the locking member to retain the same in locked position, and means for releasing the locking dog to release the locking member to permit the door to be moved into open position.

In testimony whereof I hereunto aflix my sign ature.

WILLIAM E. STONEBRIDGE. 

